studies on marine Ostracods G97 



Conclioecia splnirostris C. Claus. 



Conchoecia sfinirostris (part.), C. Claus, 1874 a, p. 177. 



1874b, p. 6; pi. I, fig. 8; pi. II, fig. 11. 

 pellucida. G. (). Sahs, 1887, p. 80; pi. XI, figs. 1—4; pi. XII; pi. XIII, 



figs. 1 — 4. 

 ,, s-pinirdstris. C C'l.AUS, 1890. p. 7. 



,, ,, ,, ,, 1891 a, p. 5(5; pi. I; figs. 1 — 12. 



G. W. MtlLLER, 1894, p. 227; pi. 6, figs. 1—9, 13; pi. 37, figs. 1(». 11. 



G. S. Brady and A. M. Norman, 1896, p. 689; pi. LX, fig. 22. 



G. S. Brady, 1902 a, p. 190. 



Ch. Juday, 1906, p. 18; pi. Ill, figs. 4—7. 



(part.), G. H. FowLER, 1909, p. 252; pi. XXR' and XXV. 



Description: — See C. Claus, 1891 a, p. 56 and G. W. Muller, 1894, p. 227. 



Supplementary description: — Male: — 



Shell: — Length: The specimens investigated by me measured 0,9 — 1,05 mm.; 

 cf. p. 704 below. Length : height aboiit 2:1; length : breadth about 2,25 :1. Seen from 

 the side it is of about the type reproduced in the accompanying fig. 1, i. e. it agrees very 

 well with the figures given by C. Claus and G. W. Muller. Seen from below (fig. 2) 

 it has its greatest width at about the middle and has evenly curved side contours; it is broadly 

 rounded anteriorly, with an almost symmetrical rostrum, and somewhat pointed posteriorly. 

 The shoulder vault is rather well developed and always well rounded. The surface of the 

 shell has a few scattered rather long, soft hairs, especially on or near the rostrum. Seen 

 from inside: Selvage: On the rostrum this is more or less finely and irregularly serrate- 

 edged or almost smooth; it is about as wide as in pi. 37, fig. 10, G. W. MCller, 1894 

 (consequently rather considerably wider than in pi. I, fig. 2, C. Claus, 1891 a) and has no large 

 spiue-like process. Along the anterior margin of the shell and the anterior part of the ventral 

 margin it is quite smooth-edged or exceedingly finely serrulated; along the posterior half of the 

 ventral margin of the shell and for a short distance along the most ventral part of the posterior 

 margin it is finely serriilated; inside the remaining part of the ventral half of the posterior margin 

 of the shell the marginal spines of the selvage are somewhat larger than the more ventral ones. 

 The unsymmetrical glands have their exits at the usual place. There are no lateral corner 

 glands. On the anterior margin, just ventrally of the rostrum, I have not found ,,dicht neben- 

 einander zwei je nach Erhaltung und physiologischem Zustand mehr odor weniger auffallige 

 Uriisen"; cf. G. W. Mt'LLER, 1906 a, p. 99. The medial glands along the posterior margin of 

 the shell are of about the same type as is described for C. oblonga on p. 618 above. I did not 

 succeed in discovering as deep a junction between the lamellae of the shell inside the rostral 

 incisur as in pi. 37, fig. 10, G. W. MtlLLER, 1894; on the other hand I was able to find 



Zoolog- bidrag. Uppsala. Suppl.-Bil. I. "w 



